Patio door rollers

A quick learner from Houston, TX says:
July 29, 2017
Greetings from Texas. I need to replace the rollers on this patio door. I have not seen this type of roller before. It appears that they are fixed wheels that connect to the bottom rail with two screws. I don't see an adjustment screw on either wheel. Can you help me identify and replace these wheels? Thank you.

Curt Braun
Patio door rollers
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Tom from SWISCO responded:
August 2, 2017
Hello, Curt. Thanks for posting. It's hard to identify your roller while it is still installed in the door. You might want to take a look at our Roller Assembly 81-245. Compare your measurements to ours and let us know what you think.
Roller Assembly, 1-3/16" Steel BB
Roller Assembly, 1-3/16" Steel BB
81-246
$6.40
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